Morphological control of mesoporous CN based hybrid materials and their excellent CO₂adsorption capacity

Abstract

We report the preparation of highly ordered rod shaped mesoporous carbon nitrides that show very high adsorption capacity for CO2molecules.

Effect of Heat Treatment on the Nitrogen Content and Its Role on the Carbon Dioxide Adsorption Capacity of Highly Ordered Mesoporous Carbon Nitride

“…[2,23,24] As discussed earlier,M CN materials have al arge number of free ÀNH and ÀNH 2 groups that can act to anchors lightly acidic molecules, such as CO 2 .P revious reports have indicated how the regular morphology of the adsorbents facilitates easy access to the active sites and enhances interparticle diffusion in addition to affecting the textural properties of the adsorbent material. [2,23,24] As discussed earlier,M CN materials have al arge number of free ÀNH and ÀNH 2 groups that can act to anchors lightly acidic molecules, such as CO 2 .P revious reports have indicated how the regular morphology of the adsorbents facilitates easy access to the active sites and enhances interparticle diffusion in addition to affecting the textural properties of the adsorbent material.…”

“…[23] This means that the morphology of the template is successfully replicated into the MCN. It is clear that each of the samples has au niform rod-shaped morphology.…”

“…[11] Porous carbon materials appear to be an ideal adsorbentf or CO 2 because of their high surfacea rea, low cost, easy regeneration, high chemical andt hermals tability,t unable porosity, and easy to control morphology. [19] MCNs are multifacetedm aterials that find applicationsi nb asic catalysis, [20] enzyme-like catalysis, [21] gas sensing, [22] CO 2 capture, [23,24] water splitting, [25] energy storage, [26] and environment applications. [2,13] It has been suggested in an umber of reports that the incorporationo fb asic functionalities, such as nitrogen or free ÀNH or ÀNH 2 groups could enhancet he CO 2 adsorption capacity of carbon-based adsorbents because nitrogen atoms can interactt hrough their lone pairs with the mildly acidic CO 2 molecule.…”

Carbon nanoflake hybrid for biohydrogen CO 2 capture: Breakthrough adsorption test

“…These findings indicate that high activation temperature may produce pores with large surface area and volume but relatively small size. Nevertheless, pore width can also be affected by several factors, such as the source of precursor, template size, sample washing, surfactant‐to‐precursor ratio, and reaction temperature . Although both samples were synthesized at the same activation temperature, the surface area of S800 was considerably lower than that of SH800, emphasizing the importance of using metal oxide as a porogen, apart from zinc acetate that acted as an activating agent and a porogen.…”

“…Nevertheless, pore width can also be affected by several factors, such as the source of precursor, template size, sample washing, surfactantto-precursor ratio, and reaction temperature. [29][30][31] Although both samples were synthesized at the same activation temperature, the surface area of S800 was considerably lower than that of SH800, emphasizing the importance of using metal oxide as a porogen, apart from zinc acetate that acted as an activating agent and a porogen. This technique was employed in past studies to create a highly porous fuel cell catalyst.…”